SUNSET: 
Mystery of the Sun's Chemical Makeup Lingers
Astronomers think they might have a solution to the conundrum of the Sun's chemical composition.
Piano Concerto on the Planets Premieres
A piano concerto based on the solar system’s planets just had its world premiere. And you can hear a sampling of the music right here!
The Sun Is Waking Up — Right On Schedule
The Sun is ramping up activity, but contrary to some reports, this solar cycle is still consistent with scientists' predictions.
NASA's Insight Lander Detects Monster Marsquake
NASA’s Mars Insight lander witnessed the largest quake detected on another world at just the right time — as the lander begins to run low on power.
Spotting Dots on the Sun
You’ve heard of sunspots, but how about Sun dots? A recent solar mission has snapped photos of tiny, bright dots on the Sun, and astronomers are contemplating their cause.
Where Did Earth’s Trojans Go? Ask the Moon
Why doesn't Earth have Trojan asteroids of its own? Large impacts in the early years of the solar system may be to blame.
Scientists Wonder: Is the Origin of Life Extraterrestrial?
A new analysis method has revealed DNA building blocks in meteorites, suggesting that these prebiotic molecules might have formed during the solar system's earliest years.
How to Observe and Measure Naked-eye Sunspots
As Solar Cycle 25 ticks up, naked-eye sunspots are becoming more frequent. They're not only fun to observe, but with this simple method you can determine just how big they are. We also have news on a bright supernova!
New Target for Asteroid Probe: “Potentially Hazardous” Apophis
Once the primary mission of NASA's OSIRIS-REx is complete, the spacecraft will head toward a new destination: near-Earth asteroid Apophis.
Celebrate Spring with the Lyrids
People have been watching the annual Lyrid meteor shower for more than 2,700 years. Come join the crowd!
What's in Store for the Next Decade of Planetary Science
Big winners in the planetary science decadal survey include a Uranus flagship mission, a orbiter and lander for Enceladus, and an emphasis on planetary defense.
Icy Moon Europa May Host Water Near the Surface
Radar measurements of ice on Earth suggest that Jupiter's moon Europa might host water near its surface.
Summer on Neptune is Surprisingly Chilly
Even though Neptune is entering its version of summer, it's actually cooling down — except for its poles, which are mysteriously warming up.
U.S. Space Force Releases Data on Bright Fireballs
The U.S. Department of Defense has released data on some 1,000 bright fireballs. Scientists are still debating if the data confirm an interstellar meteor.
Listen to the Martian Soundscape
Two microphones on Mars, carried on NASA's Perseverance rover, are for the first time revealing the sounds of another planet.
Where Did the Ice Giants Form?
Conventional planet formation scenarios have Neptune and Uranus forming closer to the Sun. But a new study shows that the ice giant planets could have formed right where they are now.
The History of Venus in Air, Rock, and Water
Forty years ago, NASA's Magellan mission “closed the book” on Venus. Now, a new generation of astronomers think the planet next door deserves a second chance.
Will Saturn Sprout Spots this Observing Season?
As Saturn returns to the morning sky, will this otherwise serene-looking planet experience another bout of severe weather? Keep your eyes peeled for white spots!
How Apollo 17 Is Preparing Artemis for a Return to the Moon
Researchers gear up for Artemis and a new generation of lunar exploration, with a look at samples from the final crewed mission to the Moon.
How Many Moons Can an Asteroid Have?
The discovery of the first quadruple asteroid system raises the question: Is there a limit to how many moons an asteroid can have?
